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- /* Test mpz_abs, mpz_add, mpz_cmp. mpz_cmp_si, mpz_cmp_ui, mpz_divmod,
- mpz_mdiv_ui, mpz_mdivmod_ui, mpz_mmod_ui, mpz_mul, mpz_mul_ui.
-
- Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of the GNU MP Library.
-
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- The GNU MP Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with the GNU MP Library; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "urandom.h"
-
- void debug_mp ();
-
- #ifndef SIZE
- #define SIZE 8
- #endif
-
- main (argc, argv)
- int argc;
- char **argv;
- {
- MP_INT dividend;
- MP_INT quotient, remainder;
- MP_INT quotient2, remainder2;
- MP_INT temp;
- mp_size dividend_size;
- mp_limb divisor;
- int i;
- int reps = 100000;
-
- if (argc == 2)
- reps = atoi (argv[1]);
-
- mpz_init (÷nd);
- mpz_init ("ient);
- mpz_init (&remainder);
- mpz_init ("ient2);
- mpz_init (&remainder2);
- mpz_init (&temp);
-
- for (i = 0; i < reps; i++)
- {
- dividend_size = urandom () % SIZE - SIZE/2;
- mpz_random2 (÷nd, dividend_size);
-
- divisor = urandom ();
- if (divisor == 0)
- continue;
-
- mpz_mdivmod_ui ("ient, &remainder, ÷nd, divisor);
- mpz_mdiv_ui ("ient2, ÷nd, divisor);
- mpz_mmod_ui (&remainder2, ÷nd, divisor);
-
- /* First determine that the quotients and remainders computed
- with different functions are equal. */
- if (mpz_cmp ("ient, "ient2) != 0)
- dump_abort (÷nd, divisor);
- if (mpz_cmp (&remainder, &remainder2) != 0)
- dump_abort (÷nd, divisor);
-
- /* Check if the sign of the quotient is correct. */
- if (mpz_cmp_ui ("ient, 0) != 0)
- if ((mpz_cmp_ui ("ient, 0) < 0)
- != (mpz_cmp_ui (÷nd, 0) < 0))
- dump_abort (÷nd, divisor);
-
- /* Check if the remainder has the same sign as the divisor
- (quotient rounded towards minus infinity). */
- if (mpz_cmp_ui (&remainder, 0) != 0)
- if (mpz_cmp_ui (&remainder, 0) < 0)
- dump_abort (÷nd, divisor);
-
- mpz_mul_ui (&temp, "ient, divisor);
- mpz_add (&temp, &temp, &remainder);
- if (mpz_cmp (&temp, ÷nd) != 0)
- dump_abort (÷nd, divisor);
-
- mpz_abs (&remainder, &remainder);
- if (mpz_cmp_ui (&remainder, divisor) >= 0)
- dump_abort (÷nd, divisor);
- }
-
- exit (0);
- }
-
- dump_abort (dividend, divisor)
- MP_INT *dividend;
- mp_limb divisor;
- {
- fprintf (stderr, "ERROR\n");
- fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
- fprintf (stderr, "divisor = %lX\n", divisor);
- abort();
- }
-
- void
- debug_mp (x, base)
- MP_INT *x;
- {
- mpz_out_str (stderr, base, x); fputc ('\n', stderr);
- }
-